ibm-information-center/dist/eclipse/plugins/i5OS.ic.rzahq_5.4.0.1/rzahqperrf.htm

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<title>Performance</title>
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<h2 id="rzahqperrf">Performance</h2>
<p><img src="delta.gif" alt="Start of change" />The IXS, IXA, and iSCSI attached servers have their own memory
and one or more processors, but share the iSeries&trade; hard disk drive storage through virtual
(simulated) disk drives. The disk drives are allocated to Windows by creating
a storage space object on the iSeries. The major difference between the integrated
servers and stand-alone servers is that stand-alone servers tend to use dedicated
disk drives and the integrated servers use iSeries storage spaces as virtual disks. iSeries integrated servers also include optional features such as Windows drivers
to share iSeries tape drives, CD and DVD drives, along with high speed virtual
Ethernet adaptors.<img src="deltaend.gif" alt="End of change" /></p>
<p><img src="delta.gif" alt="Start of change" />The use of iSeries storage spaces (virtual drives) provides
performance benefits that are not typically available in stand-alone environments
without significant storage fabric investment and maintenance costs. However,
it also imposes some limitations. You should consider these limitations when
planning and configuring integrated servers. The information below highlights
some considerations affecting performance.<img src="deltaend.gif" alt="End of change" /></p>
<p><img src="delta.gif" alt="Start of change" />Use the following links to see more performance-related information:<img src="deltaend.gif" alt="End of change" /></p>
<ul>
<li><a href="rzahqperfstgvsded.htm#rzahqperfstgvsded">iSeries storage spaces versus dedicated disks</a></li>
<li><a href="rzahqperfstoragespacebalancing.htm#rzahqperfstoragespacebalancing">Storage space balancing</a></li>
<li><a href="rzahqiscsiattachedperf.htm#rzahqiscsiattachedperf">iSCSI attached server performance</a></li>
<li><a href="rzahqperfve.htm#rzahqperfve">Virtual Ethernet</a></li>
<li><img src="delta.gif" alt="Start of change" /> <a href="http://www.ibm.com/servers/eserver/iseries/integratedxseries/" target="_blank">IBM&reg; iSeries Integrated xSeries&reg; solutions</a>
<img src="www.gif" alt="Link outside Information Center." />
<br />(www.ibm.com/servers/eserver/iseries/integratedxseries)<img src="deltaend.gif" alt="End of change" /></li>
<li><a href="http://www.ibm.com/eserver/iseries/perfmgmt/" target="_blank">iSeries Performance Management</a>
<img src="www.gif" alt="Link outside the Information Center." />
<br />(www.ibm.com/eserver/iseries/perfmgmt)</li>
<li>Chapter 17 in the <a href="../books/sc410607.pdf" target="_blank">iSeries Performance
Capabilities Reference</a>
<img src="wbpdf.gif" alt="Link to PDF" /></li></ul><img src="deltaend.gif" alt="End of change" />
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